531420653 has 4 divisors (see below), whose sum is σ = 532720380. Its totient is φ = 530120928.

The previous prime is 531420649. The next prime is 531420667. The reversal of 531420653 is 356024135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 385808164 + 145612489 = 19642^2 + 12067^2 .

It is a cyclic number.

It is not a de Polignac number, because 531420653 - 2² = 531420649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531420683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649250 + ... + 650067.

It is an arithmetic number, because the mean of its divisors is an integer number (133180095).

Almost surely, 2^531420653 is an apocalyptic number.

It is an amenable number.

531420653 is a deficient number, since it is larger than the sum of its proper divisors (1299727).

531420653 is a wasteful number, since it uses less digits than its factorization.

531420653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299726.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 531420653 is about 23052.5628293255. The cubic root of 531420653 is about 809.9896625211.

Adding to 531420653 its reverse (356024135), we get a palindrome (887444788).

The spelling of 531420653 in words is "five hundred thirty-one million, four hundred twenty thousand, six hundred fifty-three".